I've seen people who have had nickel plating on a Koolance Full Coverage Block get stripped because of silver, and I've seen nickel plating on fittings get ruined because of silver. It seems to be very prevalent in some situations and then these people like you guys who have absolutely no issues with it. Personally I'd rather be safe than sorry.

EK and Koolance both have plating issues aside from silver use,dont confuse the 2